As stated in the end credits, the little girl Sullivan saved from drowning was not his girlfriend's little sister, as portrayed in the film, but actually his own daughter.
This is about blind Hollywood celebrity Tom Sullivan, based on his memoirs. Sullivan is an actor who appeared on shows like WKRP in Cincinnati and Search for Tomorrow.
Tom Sullivan is heard to yell the identical recorded line "Hello? Can anybody hear me?" twice: once during the skydiving scene, and once during the swimming pool scene.